Flume-joint.



N. JOHNSON.

FLUME JOINT.

ABPLIOATION FILED JUNE 5. 1911.

1,018,828. I Patented Feb. 27, 1912 WWW zM Juan/b4 wl-UMBIA PLANOORAPHC0 WASHINGTON. D4 C.

ITE

NELS JOHNSON, OF BATAVIA, ILLINOIS.

FLUME-JOINT.

To all whom it may concern:

Be it known that I, NELS JOHNSON, a citi- L zen of the United States,and a resident of the city of Batavia, county of Kane, and State ofIllinois, have invented certain new and useful Improvements inFlume-Joints, of which the following is a specification,

My invention relates to improvements in joints especially adapted forthe abutting or contiguous ends of sections of fiumes, pen-stocks, andother conduits, the object of the invention being the provision of aoiilt of this character which shall be proof against leakage regardlessof the water or other fluid pressure in the conduit.

A further object of my invention is to provide a joint in a wood conduitwhich shall be simple of design and efficient in operation.

Other objects will appear hereinafter.

With these objects in View my invention consists in the novelconstruction and arrangement of parts hereinafter described and claimed.

My invention will be best understood by reference to the accompanyingdrawing forming a part of this specification and in which the figure isa perspective view of a portion of a conduit embodying my invention.

The preferred form of construction of my invention as illustrated in theaccompanying drawing comprises an end 1 of a section of a wood flume orconduit and an end 2 of a similar section arranged in alinement withsection 1 as clearly illustrated. The joint between the abutting orcontiguous ends 1 and 2 comprises a medial tongue 3 projecting from theend 1 and a medial groove 4 formed in the end 2 for the reception of thetongue 3. Shoulders 5 which are disposed transversely of the ends 1 andperpendicular to the tongue 3 are adapted to abut similar shoulders 6formed in the ends 2. Thus far the construction is similar to that ofmatched boards in common use for building purposes. The section ends 1are provided with beveled edges 7 which are the connecting surfacesbetween the shoulders 5 and the exterior and interior surfaces of theconduit. Formed at an angle corresponding with the beveled edges 7 andadapted to abut the same are flanges 8 which project from the ends 2 asclearly illustrated. The angle of the beveled edges 7 and thecorresponding surfaces of the flanges 8 is pref- Specification ofLetters Patent.

Application filed June 5, 1911.

Patented Feb. 27, 1912.

Serial No. 631,431.

erably forty-five degrees but any other suitable angle may be employed.The joint is so formed that when assembled as shown considerable spaceas at 9 intervenes be tween the end of the tongue 3 and the bottom ofthe groove 4. There may also be a space between the shoulders 5 and 6,but these shoulders are adapted to abut when the ends 1 and 2 aresubjected to extreme longitudinal pressures. It is apparent that if thespace between the shoulders 5 and 6 is too great when the ends 1 and 2are forced together said ends 2 would split at the bases of the flanges8, hence only suflicient space is provided between the shoulders 5 and 6to insure that a better joint is formed between the beveled edges 7 andflanges 8, than between said shoulders 5 and 6. Even after the shoulders5 and 6 are brought into contact there still is a space between the,

tongue 3 and the bottom of the groove 4, a tight fitting joint at thispoint not being so essential as between the beveled edges 7 and flanges8. This joint is highly efficient partly due to the numerous cornersformed therein, it being well known that a corner in the surface is moreeffective in preventing leakage than contacting level surfaces. It alsoprovides a connection which is firm and rigid, preventing the rocking ofthe members one upon the other, and also saves the interior of the jointagainst rotting by providing a tight joint at the outer edges thereof.

A joint of the construction set forth is highly eflicient in flumes andpen-stocks and other conduits, and due to the cheapness of constructionis particularly desirable for this purpose.

While I have illustrated and described the preferred form ofconstruction for carrying my invention into effect, this is capable ofvariation and modification without departing from the spirit of theinvention. I therefore do not wish to be limited to the precise detailsof construction set forth, but desire to avail myself of such variationsand modifications as come within the scope of the appended claims.

Having described my invention what I claim as new and desire to secureby Letters Patent is:

1. A joint of the character described, comprising contiguous ends offlume sections, there being a tongue on one end and a correspondinggroove on the other spaced part and substantially tight, the outerportions flume, the substantially abutting surfaces 5 and 6, and thetightly fitting beveled surfaces 7 and 8, substantially as described.

In testimony whereof I have signed my 15 name to this specification inthe presence of two subscribing Witnesses.

NELS JOHNSON.

at the bottom of the groove, the portions of said sections adjacent saidtongue and groove being perpendicular to said tongue of said sectionsbeing beveled to fit each other and to make a substantially Watertightointtherebetween, substantially as described.

2. A joint of the character described,having the tongue 3 on one sectioninterfitting the groove 9 on a contiguous section of a Witnesses:

HELEN F. LILLIS, JOSHUA R. H. Porrs.

Copies'of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

